Being born with extra fingers on a hand is called polydactyly. This is more common in some populations in North America than others due to 

A. random mating with other populations in North America.
B. natural selection in favor of extra fingers in these populations.
C. a founder effect because their ancestors from Europe carried the alleles.
D. migration of people with multiple fingers out of the population.
E. an increase in mutation rate in these populations.


Answer: C

Biology & Microbiology

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